Impedenace question: Parrallelyzer in Dumbulator Tube buffered Effects loop

[sjaltenb]

Hi,

I have a friend who needs a 3 loop Parallel mixer to mix two delays and a reverb in parallel that will be used in his Dumbulator tube buffered effects loop.

I have the parts to my old Parallelyzer sitting around which uses Jack Ormans simple JFET Splitter with J201s and and R.G.'s Simple Mixer to do the mixing.
This worked perfectly for me in my setup, but I am wondering if anything needs to be changed to run it in the tube buffered FX loop.

http://www.muzique.com/lab/splitter.htm

If anyone has any suggestions for the input impedance, that would be great.

Thank you!